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The scope of this project was to synthesis a ZnO-Cr 2 O 3  for selective imatinib removal. Molecular imprinting was used to prepare polymerisation using ZnO-Cr 2 O 3  with tetraethyl orthosilicate and 3-ammonia propyl triethoxysilane as the cross-linker and recognition sites for removal of imatinib compound. The ZnO-Cr 2 O 3 /MIP powders were characterised by field emission scanning electron microscopy (FE-SEM), X-ray diffraction, N2 adsorption-desorption, thermogravimetric analysis and dynamic light scattering. The average crystallite sizes of ZnO-Cr 2 O 3  and ZnO-Cr 2 O 3 /MIP were 40.87 and 55.45 nm, respectively. The Box-Behnken design method was used for Experiments optimisation using response surface methodology (RSM). Several factors like ZnO-Cr 2 O 3 /MIP concentration, H 2 O 2  concentration, and initial pH on the optimisation of imatinib photo-degradation were evaluated with the polynomial regression method. At optimum process factors (ZnO-Cr 2 O 3 /MIP: 1.0 g/L, H 2 O 2 : 50 mg/L, and pH: 7), the imatinib photo-degradation was achieved 94.41% during 40 min as process time. The photo-degradation analysed for several decomposition processes like UV, H 2 O 2  and UV/H 2 O 2 /ZnO-Cr 2 O 3 /MIP was carried out at the optimum factors. The ZnO–Cr 2 O 3 /MIP has high degradation turnover and selectivity, depicting the efficiency for removal of selective imatinib.

international journal of environmental analytical chemistry

Synthesis and characterisation of zinc oxide-chromium oxide for optimisation of photocatalytic/H 2 O 2  process by response surface methodology: selective and regeneration studies